Service indication method and relevant devices

ABSTRACT

A service indication method includes: acquiring service indication information, the service indication information including at least one of support information about a service and preference information about the service, the service including at least one of an emergency service and a voice service; and performing a relevant operation on the service in accordance with the acquired service indication information.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation application of U.S. patentapplication Ser. No. 16/962,281 filed on Jul. 15, 2020, which is theU.S. national phase of PCT Application No. PCT/CN2019/071864 filed onJan. 16, 2019, which claims priority to Chinese Patent Application No.201810041445.2 filed on Jan. 16, 2018, which are incorporated herein byreference in their entireties.

TECHNICAL FIELD

The present disclosure relates to the field of communicationstechnology, in particular to service indication methods and relevantdevices and relevant non-transitory computer-readable storage media.

BACKGROUND

5^(th)-Generation (5^(th) Generation, 5G) communications system mayinclude a new radio (New Radio, NR) network element and an enhanced longterm evolution (enhanced Long Term Evolution, eLTE) network element. TheNR network element (e.g., an NR base station) is a real 5G networkelement, while the eLTE network element (e.g., an eLTE base station) isa cell eLTE network element accessing a 5G core network. Currently, the5G communications system includes various radio access networks, andthere is an urgent need to provide a scheme for a terminal to performrelevant operations on services effectively.

SUMMARY

In one aspect, the present disclosure provides in an embodiment anon-transitory computer-readable storage medium storing therein acomputer program, wherein the computer program is executed by aprocessor of a Radio Access Network (RAN) so as to implement a serviceindication method. Specifically the service indication method includes:acquiring service indication information from an Access and MobilityManagement Function (AMF) and a Packet Data Unit (PDU) session orQuality of Service (QoS) flow establishment request for a service, theservice indication information including support information about theservice, the service including at least one of an emergency service or avoice service; and preforming a relevant operation on the service inaccordance with the acquired service indication information and the PDUsession or the QoS flow establishment request for the service.Specifically the support information about the service includes servicesupport type information; wherein the service support type informationis used to indicate whether redirection to Evolved Packet System (EPS)for supporting the service is possible or not. And the performing therelevant operation on the service in accordance with the serviceindication information includes one of: accepting a PDU session or QoSflow establishment request for the service, handing over the terminal toan enhanced Long Term Evolution (eLTE), handing over the terminal to anEPS, or re-directing the terminal to an EPS.

In another aspect, the present disclosure provides in an embodiment anAMF, including a memory, a processor, and a program stored in the memoryand executed by the processor. And the processor is configured toexecute the program so as to implement a service indication method. Theservice indication method includes: acquiring service capabilityinformation; and determining service indication information inaccordance with the acquired service capability information andtransmitting the service indication information to an RAN, the serviceindication information including support information about a service,the service including at least one of an emergency service or a voiceservice. Specifically the support information about the service includesservice support type information. And the service support typeinformation is used to indicate whether redirection to EPS forsupporting the service is possible or not. Specifically the acquiringthe service capability information includes at least one of: receivingservice capability information about a terminal from the terminal, theservice capability information being used to indicate whether theservice is supported by the terminal.

In yet another aspect, the present disclosure provides in an embodimenta non-transitory computer-readable storage medium storing therein acomputer program. And the computer program is executed by a processor ofan AMF so as to implement a service indication method. The serviceindication method includes: acquiring service capability information;and determining service indication information in accordance with theacquired service capability information and transmitting the serviceindication information to an RAN, the service indication informationincluding support information about a service, the service including atleast one of an emergency service or a voice service. Specifically thesupport information about the service includes service support typeinformation. And the service support type information is used toindicate whether redirection to EPS for supporting the service ispossible or not. And the acquiring the service capability informationincludes at least one of: receiving service capability information abouta terminal from the terminal, the service capability information beingused to indicate whether the service is supported by the terminal.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to illustrate the technical solutions of embodiments of thepresent disclosure in a clearer manner, the drawings used by embodimentsof the present disclosure will be described hereinafter briefly.Obviously, the following drawings merely relate to embodiments of thepresent disclosure, and based on these drawings, a person skilled in theart may obtain the other drawings without any creative effort.

FIG. 1 is a structural figure showing an available service indicationsystem according to an embodiment of the present disclosure;

FIG. 2 is a flow chart of a service indication method according to anembodiment of the present disclosure;

FIG. 3 is a flow chart of another service indication method according toan embodiment of the present disclosure;

FIG. 4 is a flow chart of yet another service indication methodaccording to an embodiment of the present disclosure;

FIG. 5 is a flow chart of still yet another service indication methodaccording to an embodiment of the present disclosure;

FIG. 6 is a schematic figure showing a service indication methodaccording to an embodiment of the present disclosure;

FIG. 7 is a schematic figure showing another service indication methodaccording to an embodiment of the present disclosure;

FIG. 8 is a schematic figure showing yet another service indicationmethod according to an embodiment of the present disclosure;

FIG. 9 is a schematic figure showing still yet another serviceindication method according to an embodiment of the present disclosure;

FIG. 10 is a schematic figure showing still yet another serviceindication method according to an embodiment of the present disclosure;

FIG. 11 is a structural figure showing a terminal according to anembodiment of the present disclosure;

FIG. 12 is another structural figure showing the terminal according toan embodiment of the present disclosure;

FIG. 13 is a structural figure showing a network element according to anembodiment of the present disclosure;

FIG. 14 is another structural figure showing the network elementaccording to an embodiment of the present disclosure;

FIG. 15 is yet another structural figure showing the network elementaccording to an embodiment of the present disclosure;

FIG. 16 is a structural figure showing a network element according to anembodiment of the present disclosure;

FIG. 17 is another structural figure showing the network elementaccording to an embodiment of the present disclosure;

FIG. 18 is a structural figure showing the terminal according to anembodiment of the present disclosure;

FIG. 19 is a structural figure showing the network element according toan embodiment of the present disclosure; and

FIG. 20 is a structural figure showing the network element according toan embodiment of the present disclosure.

DETAILED DESCRIPTION

The present disclosure will be described hereinafter in a clear andcomplete manner in conjunction with a drawing in an embodiment.Obviously, the following embodiments merely relate to a part of, ratherthan all of, the embodiments of the present disclosure, and based onthese embodiments, a person skilled in the art may, without any creativeeffort, obtain the other embodiments, which also fall within the scopeof the present disclosure.

FIG. 1 shows a structural figure of an available service indicationsystem according to an embodiment of the present disclosure. As shown inFIG. 1 , the service indication system includes a terminal 11, a firstnetwork element 12 and a second network element 13.

The terminal 11 may be a user equipment (UE), e.g., mobile phone, tabletpersonal computer (Tablet Personal Computer), laptop computer (LaptopComputer), personal digital assistant (Personal Digital Assistant, PDA),mobile Internet device (Mobile Internet Device, MID) or wearable device.It should be appreciated that, a specific type of the terminal 11 willnot be particularly defined herein.

The first network element 12 may be any network side device or networkfunction. For example, the first network element 12 may be a radioaccess network network element or a core network network element. Inaddition, the first network element 12 may interact with the terminal 11or any other network element. The second network element 13 may be anynetwork side device or network function different from the first networkelement 12, and it may be a radio access network network element or acore network network element.

In an embodiment of the present disclosure, the core network networkelement may include at least one of a core network device, a corenetwork node, a core network function, a core network network unit, amobility management entity (Mobility Management Entity, MME), an accessmanagement function (Access Management Function, AMF), a sessionmanagement function (Session Management Function, SMF), a user planefunction (User Plane Function, UPF), a serving gateway (serving GW,SGW), a PDN gateway (PDN Gate Way, PDN gateway), a policy controlfunction (Policy Control Function, PCF), a policy and charging rulesfunction (Policy and Charging Rules Function, PCRF), a serving generalpacket radio service support node (Serving GPRS Support Node, SGSN), agateway GPRS support node (Gateway GPRS Support Node, GGSN) wirelessaccess network device.

In an embodiment of the present disclosure, the RAN network element mayinclude at least one of an RAN device, an RAN node, an RAN function, anRAN unit, a 3^(rd)-Generation partnership project (3GPP) RAN, a non-3GPPRAN, a centralized unit (Centralized Unit, CU), a distributed unit(Distributed Unit, DU), a base station, an evolved Node B (eNB), a gNB,a radio network controller (Radio Network Controller, RNC), a Node B, anon-3GPP InterWorking function (Non-3GPP InterWorking Function, N3IWF),an access controller (Access Controller, AC) node, an access point(Access Point, AP) device, or a wireless local area networks (WirelessLocal Area Networks, WLAN) node.

The base station may be a base transceiver station (Base TransceiverStation, BTS) in a global system for mobile communications or CDMA, aNode B in a WCDMA, an evolved Node B (eNB or e-NodeB, evolutional NodeB) in LTE, or a 5G base station (gNB), which will not be particularlydefined herein.

In an embodiment of the present disclosure, service support typeinformation may also be represented as service support mode informationor service support method information. The service support typeinformation may indicate information that the service is supported bydifferent implementation modes.

In an embodiment of the present disclosure, in a mode in which theservice is supported in a fallback mode, a terminal may initiate aservice request and then a network may perform a subsequent operation.The subsequent operation may include rolling back the terminal to thenetwork directly supporting the service, e.g., handing over the terminalto an eLTE, handing over the terminal to an evolved packet system (EPS),or re-directing the terminal to an EPS. The eLTE or the EPS may directlysupport the service.

In an embodiment of the present disclosure, a service support indicatormay be used to indicate whether the terminal is initiating packet dataunit (PDU) session establishment for the service, and then the networkmay perform a subsequent operation. For example, the subsequentoperation may include establishing the service for the terminal on acurrent network, handing over the terminal to the eLTE, handing over theterminal to an EPS, or re-directing the terminal to an EPS.

In an embodiment of the present disclosure, eLTE is a mode where EUTRAis directly connected to 5GC, and an EPS may also be called as LTE.

In an embodiment of the present disclosure, an emergency service mayalso be called as one of emergency voice service, or emergency Internetprotocol (IP) multimedia subsystem (IMS) voice service.

In an embodiment of the present disclosure, a voice service may also becalled as IMS voice service over PS domain session mode.

The present disclosure provides in an embodiment a service indicationmethod for a terminal which, as shown in FIG. 2 , includes the followingsteps.

Step 201: acquiring service indication information, the serviceindication information including at least one of support informationabout a service and preference information about the service, theservice including at least one of an emergency service and a voiceservice.

The service indication information may be received from a network sidedevice, e.g., from the first network element or the second networkelement in the system as shown in FIG. 1 . In addition, it should beappreciated that, when the service includes at least one of theemergency service and the voice service, the service may include theemergency service or the voice service, or both. The emergency servicemay be an emergency voice service, e.g., making a police call or anemergency call, which will not be particularly defined herein. The voiceservice may be an IP multimedia subsystem (IP Multimedia Subsystem, IMS)voice service over PS domain session (IMS voice over PS SessionSupported Indication), or any other voice service, which will not beparticularly defined herein.

The support information about the service may be used to indicatewhether the above service is supported, e.g., indicate that the aboveservice is supported by the network side device, so the terminal mayinitiate a corresponding service in accordance with the supportinformation about the service, so as to improve the service performanceof the terminal.

The preference information about the service may be used to indicate apreference of performing, by the network side device, an operation forthe service, e.g., a preference of initiating PDU session establishmentfor the service, a preference of initiating a service request for theservice, a preference of initiating PDU session establishment for theservice preferentially and then initiating a service request for theservice, or a preference of initiating a service request for the servicepreferentially and then initiating PDU session establishment for theservice. Based on the preference information about the service, it isable for the terminal to initiate the service in a corresponding mode,such that a problem where the terminal can hardly determine in whichmode the service should be initiated is prevented, thereby to improvethe service performance of the terminal.

Step 202: performing a relevant operation on the service in accordancewith the acquired service indication information.

The performing the relevant operation on the service in accordance withthe acquired service indication information may include: determiningwhether the service is supported in accordance with the supportinformation about the service in the service indication information, andwhen the service is supported, initiating the service; or performing anoperation corresponding to the preference information about the service,e.g., initiating the service request or the session establishment, whichwill not be particularly defined herein.

Through the above steps, the terminal may acquire the service indicationinformation and perform the relevant operation on the serviceeffectively, so as to improve the service performance of the terminal.

It should be appreciated that, the above method may be applied to, butnot limited to, a 5G system. In other words, the method may be appliedto any other communications system, e.g., a 6^(th)-Generation (6^(th)Generation, 6G) system or any other communications system where theservice indication information is used, as long as a substantially samefunction may be achieved.

Optionally, the service indication information may further includeservice operation information.

Optionally, prior to acquiring the service indication information, theservice indication method may further include transmitting servicecapability information about the terminal to a first network element,and the service capability information may be used to indicate whetherthe terminal supports the service.

Optionally, the support information about the service may include atleast one of a service support indicator and service support typeinformation.

Optionally, the service support indicator may be used to indicatewhether the service is supported, or the service support indicator maybe used to indicate at least one of whether the service is supported byan NR, whether the service is supported by an eLTE, and whether theservice is supported by an EPS.

Optionally, whether the service is supported by an EPS may include atleast one of whether the terminal is supported to be handed over to anEPS to support the service and whether the terminal is supported to bere-directed to an EPS to support the service.

Optionally, the service support type information may be used to indicatesupport type for the service, or the service support type informationmay be used to indicate at least one of whether the service is supportedby an NR, whether the service is supported by an eLTE, whether theservice is supported by an EPS, whether the terminal is handed over toan EPS to support the service, and whether the terminal is re-directedto an EPS to support the service.

Optionally, the service indication information may further includeindication information indicating whether the service is supported in afallback mode. In an embodiment of the present disclosure, theindication information indicating whether the service is supported inthe fallback mode may include one of whether the terminal is supportedto be handed over to the eLTE for a fallback operation, whether theterminal is supported to be handed over to an EPS for the fallbackoperation, and whether the terminal is supported to be re-directed to anEPS for the fallback operation. A target network (e.g., an eLTE or anEPS) acquired through the fallback operation may directly support theservice.

Optionally, the preference information about the service may include atleast one of preference information indicating a preference ofinitiating PDU session establishment for the service, preferenceinformation indicating a preference of initiating a service request forthe service, preference information indicating a preference ofinitiating PDU session establishment for the service preferentially andthen initiating a service request for the service, and preferenceinformation indicating a preference of initiating a service request forthe service preferentially and then initiating PDU session establishmentfor the service.

Optionally, the service indication information may be a piece of serviceindication information at a location area, and a different piece ofservice indication information may correspond to a different locationarea respectively, i.e., the pieces of service indication information atdifferent location areas (e.g., tracking areas (Tracking Areas, TAs))may be different.

According to the embodiments of the present disclosure, the serviceindication information may be acquired, the service indicationinformation may include at least one the support information about theservice and the preference information about the service, and theservice may include at least one of the emergency service and the voiceservice. Next, the relevant operation may be on the service inaccordance with the acquired service indication information. As aresult, it is able for the terminal to perform the relevant operation onthe services effectively in accordance with the service indicationinformation.

The present disclosure further provides in an embodiment a serviceindication method for a terminal which, as shown in FIG. 3 , includesthe following steps.

Step 301: transmitting service capability information about the terminalto a first network element, the service capability information beingused to indicate whether the terminal supports the service.

The service capability information may be transmitted during aregistration procedure, a connection establishment procedure or aservice request procedure. Based on the service capability information,it is able for the first network element to determine a terminalcapability, thereby to determine the corresponding service indicationinformation in accordance with the terminal capability.

It should be appreciated that, Step 301 may be optional. For example,the first network element may acquire the capability information aboutthe terminal in advance, or determine that the terminal supports theservice by default, which will not be particularly defined herein.

Step 302: acquiring service indication information, the serviceindication information including at least one of support informationabout the service and preference information about the service, theservice including at least one of an emergency service and a voiceservice.

The service indication information may be received from the firstnetwork element. For example, the terminal may transmit the capabilityinformation via a registration request message, and the first networkelement may transmit to the terminal a registration acceptance messageincluding the service indication information. Of course, the terminalmay transmit a service request or a session establishment request forthe service to the first network element, and the first network elementmay transmit to the terminal a corresponding fallback message includingthe service indication information.

Step 303: performing a relevant operation on the service in accordancewith the acquired service indication information.

In an embodiment of the present disclosure, the support informationabout the service may include at least one of a service supportindicator and service support type information.

The service support indicator may be used to indicate whether theservice is supported. For example, when the service is supported by oneor more of an NR, an eLTE or an EPS, the service support indicator maybe used to indicate that the service is to be supported by one bit. Inthis regard, it is able to simplify a procedure of determining whetherto initiate the service by the terminal.

The 5G system may support the service in, but not limited to, at leastone of the following modes.

In a first mode, the 5G system supports the service (at least one of theemergency service and the voice service), e.g., the NR and the 5G corenetwork (5GC) may directly support the emergency service.

In a second mode, when a quality of service (Quality of Service, QoSflow or a PDU session has been established for the service (at least oneof the emergency service and the voice service), an evolved-UMTSterrestrial radio access (Evolved-UMTS Terrestrial Radio Access,E-UTRAN) may be connected to the 5G core network (5GC) to support theservice, and a 5G radio access network (NG RAN) may switch the terminalto the E-UTRAN of the 5GC.

In a third mode, when the QoS flow or PDU session has been establishedfor the service (at least one of the emergency service and the voiceservice), the 5G RAN may switch the terminal to an EPS, and the EPS maysupport an emergency session.

In a fourth mode, when the QoS flow or PDU session has been establishedfor the service (at least one of the emergency service and the voiceservice), the 5G RAN may trigger the terminal to be re-directed to anEPS, and the EPS may support the emergency session.

In this regard, in any one of the above modes, the service supportindicator may indicate that the service is supported.

In a possible embodiment of the present disclosure, when the servicesupport type information indicates that the emergency service issupported by the NR, the service support indicator may indicate that theservice is supported.

In another possible embodiment of the present disclosure, when theservice support type information indicates that the emergency service issupported by the eLTE, the service support indicator may indicate thatthe service is supported.

In yet another possible embodiment of the present disclosure, when theservice support type information indicates that the emergency service isnot supported by the eLTE nor the NR but the terminal is supported bythe network to be handed over or re-directed to an EPS, the servicesupport indicator may indicate that the service is supported.

For example, Table 1 and Table 2 show situations by taking a TA and theemergency service as an example.

TABLE 1 EPS supports EPS supports NR eLTE the emergency the emergencysupports supports service, and service, and the the 5G RAN 5G RANEmergency emergency emergency supports the supports the service serviceservice handing over re-directing support within TA within TA of UE toEPS of UE to EPS indicator 1 — — — Y — 1 — — Y — — 1 — Y — — — 1 Y

TABLE 2 EPS supports EPS supports NR eLTE the emergency the emergencysupports supports service, and service, and the the 5G RAN 5G RANEmergency Emergency emergency emergency supports the supports theservice service service service handing over re-directing supportsupport type within TA within TA of UE to EPS of UE to EPS indicatorinformation 1 0 — —t Y TA_NR = Y TA_eLTE = N 1 1 — — Y TA_NR = Y TA_eLTE= Y 0 1 — — Y TA_eLTE = Y 0 0 1 — Y TA_NR = N TA_eLTE = N 0 0 — 1 YTA_NR = N TA_eLTE = N

In the above tables, TA_NR=Y represents that the NR supports theemergency service within the TA, TA_eLTE=N represents that the eLTE doesnot support the emergency service within the TA, TA_NR=N represents thatthe NR does not support the emergency service, and TA_eLTE=Y representsthat the eLTE supports the emergency service within the TA.

In addition, the service support type information may be used toindicate at least one of whether the service is supported by an NR,whether the service is supported by an eLTE, whether the service issupported by an EPS, whether the service is supported by handing overthe terminal to an EPS, and whether the service is supported byre-directing the terminal to an EPS. In this regard, an NR servicesupport indicator, an eLTE service support indicator and an EPS servicesupport indicator may be indicated through three bits respectively, soas to reduce signaling overhead.

The service support indicator may be used to indicate at least one ofwhether the service is supported by an NR, whether the service issupported by an eLTE, whether the terminal is supported to be handedover to an EPS to support the service and whether the terminal issupported to be re-directed to an EPS to support the service. When theterminal supported to be handed over or re-directed to an EPS to supportthe service, an EPS may support the service by default. In this regard,an NR emergency service support indicator, EPS handing over supportinformation and EPS re-directing support information may be indicatedthrough four bits.

Of course, in an embodiment of the present disclosure, the servicesupport indicator may be used to indicate, apart from whether theservice is supported, at least one of whether the service is supportedby an NR, whether the service is supported by an eLTE, whether theterminal is supported to be handed over to an EPS to support theservice, and whether the terminal is supported to be re-directed to anEPS to support the service. In this regard, the terminal may determinewhether the service is supported and a corresponding service supportmode when the service is supported. At this time, a user may know howthe emergency service is realized, so it is able to prevent theoccurrence of cheating.

In addition, the service support type information may be used toindicate an implementation mode of the service in the network. Forexample, the service support type information may be used to indicatesupport type for the service; or the service support type informationmay be used to indicate at least one of whether the service is supportedby an NR, whether the service is supported by an eLTE, and whether theservice is supported by an EPS.

Whether the service is supported by the EPS may include at least one ofwhether the terminal is handed over to an EPS to support the service andwhether the terminal is re-directed to an EPS to support the service.

In an embodiment of the present disclosure, based on the service supporttype information, it is able for the terminal to determine the servicesupport mode. As a result, it is able for the user to know how theemergency service is realized, thereby to prevent the occurrence ofcheating.

Optionally, the service indication information may further includeindication information indicating whether the service is supported in afallback mode. The indication information may be called as supportinformation about the service in a fallback mode.

In Step 302, the support information about the service may be supportinformation about the service in a non-fallback mode. Of course, in Step302, the support information about the service may include at least oneof the support information about the service in a non-fallback mode andthe support information about the service in a fallback mode. Thesupport information about the service in a non-fallback mode may be usedto indicate whether the service is supported in any mode other than thefallback mode (i.e., the non-fallback mode), e.g., whether the serviceis supported to be initiated directly by the terminal, or whether theservice is to supported to be initiated through scheduling by thenetwork side device.

In an embodiment of the present disclosure, the support informationabout the service in a fallback mode may be used to indicate theterminal whether the service is supported in a fallback mode, so it isable for the terminal to transmit the service in a fallback mode.

Optionally, when a predetermined condition has been met, the serviceindication information may include the preference information about theservice.

The preference information about the service may include at least one ofpreference information about the emergency service and preferenceinformation about the voice service.

In an embodiment of the present disclosure, after the first networkelement determines that the predetermined condition has been met, thepreference information about the service may be carried in thetransmitted service indication information.

In addition, in an embodiment of the present disclosure, the serviceindication information may include both the preference information aboutthe service and the support information about the service in a fallbackmode. Of course, in the absence of the support information about theservice in a fallback mode, the service indication information may alsoinclude the preference information about the service, which will not beparticularly defined herein.

The predetermined condition may be predefined in a protocol, orconfigured by the network side device.

Optionally, the predetermined condition may include, but not limited to,at least one of a condition where the support information about theservice indicates that the service is supported, and a condition wherethe support information about the service in a fallback mode indicatesthat the service is supported in a fallback mode.

In an embodiment of the present disclosure, in the case that the serviceis supported, the preference information about the service may beconfigured for the terminal, so as to enable the terminal to initiatethe service in a corresponding mode.

To be specific, the predetermined condition may include at least one ofa condition where the support information about the service indicatesthat the emergency service is to be supported and to be supported in afallback mode, a condition where the support information about theservice indicates that the voice service is to be supported, a conditionwhere the support information about the service indicates that the voiceservice is to be supported in a fallback mode, and a condition where thesupport information about the service indicates that the voice serviceis to be supported and to be supported in a fallback mode.

For example, when at least one of a condition where the emergencyservice support indicator indicates that the emergency service is to besupported, a condition where the emergency service support indicatorindicates that the emergency service is to be supported in a fallbackmode, a condition where the emergency service support indicatorindicates that the emergency service is to be supported and to besupported in a fallback mode, a condition where a PS voice servicesupport indicator indicates that the voice service is to be supported, acondition where an EPS fallback indicator indicates that the service issupported in a service request mode, and a condition where the PS voiceservice support indicator indicates that the voice service is to besupported and the EPS fallback indicator indicates that the service issupported in a service request mode has been met, the service indicationinformation may include at least one of the preference information aboutthe emergency service and the preference information about the voiceservice.

Optionally, when the emergency service support indicator indicates thatthe emergency service is to be supported and to be supported in afallback mode, the preference information about the service may includepreference information about the emergency service. When the PS voiceservice support indicator indicates that the voice service is to besupported and the EPS fallback indicator indicates that the service issupported in a service request mode, the preference information aboutthe service may include preference information about the emergencyservice.

In addition, when the support information about the service indicatesthat the service is supported, the terminal is initiating PDU sessionestablishment for the service. When the service support information in afallback mode indicates that the service is supported in a fallbackmode, the terminal is initiating a service request for the service.Hence, the terminal may initiate different requests at differentconditions, so as to further improve the service performance of theterminal.

Optionally, the preference information about the service may include atleast one of preference information indicating a preference ofinitiating PDU session establishment for the service, preferenceinformation indicating a preference of initiating a service request forthe service, preference information indicating a preference ofinitiating PDU session establishment for the service preferentially andthen initiating a service request for the service, and preferenceinformation indicating a preference of initiating a service request forthe service preferentially and then initiating PDU session establishmentfor the service.

For example, the preference information about the emergency service mayinclude at least one of preference information indicating a preferenceof initiating PDU session establishment for the emergency service,preference information indicating a preference of initiating a servicerequest for the emergency service, preference information indicating apreference of initiating PDU session establishment for the emergencyservice preferentially and then initiating the service request for theemergency service, and preference information indicating a preference ofinitiating the service request for the emergency service preferentiallyand then initiating PDU session establishment for the emergency service.

The preference information about the voice service may include at leastone of preference information indicating a preference of initiating PDUsession establishment for the voice service, preference informationindicating a preference of initiating a service request for the voiceservice, preference information indicating a preference of initiatingPDU session establishment for the voice service preferentially and theninitiating the service request for the voice service, and preferenceinformation indicating a preference of initiating the service requestfor the voice service preferentially and then initiating PDU sessionestablishment for the voice service.

Through the preference information about the service, it is able for theterminal to initiate the service in a corresponding mode, i.e.,determine the mode for initiating the service, thereby to improve theservice performance of the terminal.

It should be appreciated that, the terminal may initiate a correspondingservice behavior in accordance with the preference information about theservice. For example, when the emergency service or voice service needsto be initiated, a service request or a PDU session request may beinitiated in accordance with the preference information; or when merelythe PDU session establishment for the emergency service tends to beinitiated, the PDU session establishment for the emergency service maybe initiated; or when merely the service request for the emergencyservice tends to be initiated, the service request for the emergencyservice may be initiated; or when the PDU session establishment for theemergency service needs to be initiated preferentially, the PDU sessionestablishment for the emergency service may be initiated preferentially;or when the service request for the emergency service needs to beinitiated preferentially, the service request for the emergency servicemay be initiated preferentially.

Optionally, the service indication information may be a piece of serviceindication information at a location area, and a different piece ofservice indication information may correspond to a different locationarea respectively.

In an embodiment of the present disclosure, the service indicationinformation may be provided in accordance with the location areas (e.g.,TAs), and different location areas (e.g., TAs) may correspond todifferent pieces of service indication information. Further, radioaccess technologies (Radio Access Technologies, RATs) may also bedifferentiated from each other, so as to provide different pieces ofservice indication information at different location areas (e.g., TAs)using different RATs, thereby to improve the accuracy of the serviceindication information.

In an embodiment of the present disclosure, on the basis of the methodin FIG. 2 , various possible implementation modes have been added, so asto enable the terminal to perform the relevant operation on the serviceeffectively, thereby to improve the service performance of the terminal.

The present disclosure further provides in an embodiment a serviceindication method for a first network element which, as shown in FIG. 4, includes: Step 401 of acquiring service capability information; andStep 402 of determining service indication information in accordancewith the acquired service capability information, the service indicationinformation including at least one of support information about aservice, service operation information and preference information aboutthe service, the service including at least one of an emergency serviceand a voice service.

Optionally, the acquiring the service capability information may includeat least one of: receiving the service capability information about aterminal from the terminal, the service capability information beingused to indicate whether the terminal supports the service; andreceiving the service capability information about a second networkelement from the second network element, the service capabilityinformation being used to indicate whether the second network elementsupports the service.

Optionally, the service capability information about the terminal mayinclude at least one of whether the service is supported in anon-fallback mode, whether the service is supported in a fallback mode,whether an EPS is to be supported, whether the terminal is supported tobe handed over to an EPS, whether the terminal is supported to bere-directed to an EPS, whether PDU session establishment for the serviceis supported to be initiated, and whether a service request for theservice is supported to be initiated; and/or the service capabilityinformation about the second network element may include at least one ofwhether the service is supported in a non-fallback mode, whether theservice is supported in a fallback mode, whether the terminal issupported to be handed over to a network supporting the service, whetherthe terminal is supported to be handed over to an EPS, whether theterminal is supported to be re-directed to an EPS, and whether theservice is supported directly.

Optionally, subsequent to determining the service indicationinformation, the service indication method may further include at leastone of transmitting the service indication information to the terminaland transmitting the service indication information to the secondnetwork element.

It should be appreciated that, the transmitting the service indicationinformation to the terminal may be optional. For example, the serviceindication information may be merely transmitted to the second networkelement, and then the second network element may schedule the terminalto perform the relevant operation on the service in accordance with theservice indication information, or the second network element maytransmit the service indication information to the terminal.

Optionally, the support information about the service may include atleast one of a service support indicator and service support typeinformation.

Optionally, the service support indicator may be used to indicatewhether the service is supported, or the service support indicator maybe used to indicate at least one of whether the service is supported byan NR, whether the service is supported by an eLTE, and whether theservice is supported by an EPS.

In an embodiment of the present disclosure, whether the service issupported by the EPS may include at least one of whether the terminal issupported to be handed over to an EPS to support the service and whetherthe terminal is supported to be re-directed to an EPS to support theservice.

Optionally, the service support type information may be used to indicatesupport type for the service, or the service support type informationmay be used to indicate at least one of whether the service is supportedby an NR, whether the service is supported by an eLTE, and whether theservice is supported by an EPS.

Optionally, the service indication information may further includeindication information indicating whether the service is supported in afallback mode.

Optionally, the service operation information may include at least oneof indication information indicating that a PDU session for the serviceis to be accepted or a request for establishing a QoS flow is to beaccepted, indication information indicating that the terminal is to behanded over to the eLTE, indication information indicating that theterminal is to be handed over to an EPS, and indication informationindicating that the terminal is to be re-directed to an EPS.

Optionally, when a predetermined condition has been met, the serviceindication information may include the preference information about theservice.

Optionally, the predetermined condition may include at least one of acondition where the support information about the service indicates thatthe service is supported, and a condition where the support informationabout the service in a fallback mode indicates that the service issupported in a fallback mode.

Optionally, the preference information about the service may include atleast one of preference information indicating a preference ofinitiating PDU session establishment for the service, preferenceinformation indicating a preference of initiating a service request forthe service, preference information indicating a preference ofinitiating PDU session establishment for the service preferentially andthen initiating a service request for the service, and preferenceinformation indicating a preference of initiating a service request forthe service preferentially and then initiating PDU session establishmentfor the service.

Optionally, the service indication information may be a piece of serviceindication information at a location area, and a different piece ofservice indication information may correspond to a different locationarea respectively, i.e., the pieces of service indication information atdifferent location areas (e.g., TAs) may be different.

It should be appreciated that, the implementation of the method in anembodiment of the present disclosure may refer to the relevantdescription about the first network element in FIG. 2 and FIG. 3 with asame beneficial effect, and thus will not be particularly definedherein.

The present disclosure further provides in an embodiment a serviceindication method for a second network element which, as shown in FIG. 5, includes: Step 501 of acquiring service indication information, theservice indication information including at least one of supportinformation about a service, service operation information, andpreference information about the service, the service including at leastone of an emergency service and a voice service; and Step 502 ofpreforming a relevant operation on the service in accordance with theacquired service indication information.

The performing the relevant operation on the service may include, inaccordance with the service indication information, accepting a PDUsession or QoS flow establishment request for the service initiated by aterminal, handing over the terminal to an eLTE, handing over theterminal to an EPS or re-directing the terminal to an EPS, which willnot be particularly defined herein.

Optionally, prior to acquiring the service indication information, theservice indication method may further include transmitting servicecapability information about the second network element to a firstnetwork element, and the service capability information may be used toindicate whether the second network element supports the service.

Optionally, the support information about the service may include atleast one of a service support indicator and service support typeinformation.

Optionally, the service support indicator may be used to indicatewhether the service is supported, or the service support indicator maybe used to indicate at least one of whether the service is supported byan NR, whether the service is supported by an eLTE, and whether theservice is supported by an EPS.

Optionally, the service support type information may be used to indicatesupport type for the service, or the service support type informationmay be used to indicate at least one of whether the service is supportedby an NR, whether the service is supported by an eLTE, whether theservice is supported by an EPS, whether the terminal is handed over toan EPS to support the service, and whether the terminal is re-directedto an EPS to support the service.

Optionally, the service indication information may further includeindication information indicating whether the service is supported in afallback mode.

Optionally, the service operation information may include at least oneof indication information indicating that a PDU session for the serviceis to be accepted or a request for establishing a QoS flow is to beaccepted, indication information indicating that the terminal is to behanded over to the eLTE, indication information indicating that theterminal is to be handed over to an EPS, and indication informationindicating that the terminal is to be re-directed to an EPS. In anembodiment of the present disclosure, when the service supportinformation includes the service support indicator (e.g., indicatingwhether the service is supported), the session operation information mayinclude one of indication information indicating that the PDU sessionfor the service is to be accepted, indication information indicatingthat the terminal is to be handed over to the eLTE, indicationinformation indicating that the terminal is to be handed over to an EPS,and indication information indicating that the terminal is to bere-directed to an EPS. In another possible embodiment of the presentdisclosure, the service support information includes the indicationinformation indicating that the service is supported in a fallback mode,the session operation information may include indication informationindicating that the terminal is to be handed over to the eLTE,indication information indicating that the terminal is to be handed overto an EPS, and indication information indicating that the terminal is tobe re-directed to an EPS.

Optionally, the service indication information may be a piece of serviceindication information at a location area, and a different piece ofservice indication information may correspond to a different locationarea respectively, i.e., the pieces of service indication information atdifferent location areas (e.g., TAs) may be different.

Optionally, the performing the relevant operation on the service inaccordance with the acquired service indication information may includereceiving a request for establishing a PDU session or QoS flow for theservice, and/or receiving the session operation information.

Optionally, when the second network element has received the request forestablishing a PDU session or QoS flow for the service or has receivedthe session operation information, the performing the relevant operationon the service in accordance with the acquired service indicationinformation may include at least one of: when a first condition has beenmet, receiving the request for establishing a PDU session or QoS flowfor the service, the first condition including at least one of acondition where the second network element is an NR base station and theservice support indicator indicates that the service is supported by theNR, a condition where the second network element is an eLTE base stationand the service support indicator indicates that the service issupported by the eLTE condition, and a condition where the sessionoperation information indicates that the request for establishing a PDUsession or QoS flow for the service is to be accepted; when a secondcondition has been met, handing over the terminal to the eLTE, thesecond condition including at least one of a condition where the secondnetwork element is the NR base station and the service support indicatorindicates that the service is not supported by the NR condition and theservice is supported by the eLTE condition, and a condition where thesession operation information indicates that the terminal is to behanded over to the eLTE; when a third condition has been met, handingover the terminal to an EPS, the third condition including at least oneof a condition where the second network element is an NR base station oran eLTE base station and the service support indicator indicates thatthe service is not supported by an NR and an eLTE and the terminal issupported to be handed over to an EPS to support the service, and acondition where the session operation information indicates that theterminal is to be handed over to an EPS; and when a fourth condition hasbeen met, re-directing the terminal to an EPS, the fourth conditionincluding at least one of a condition where the second network elementis an NR base station or an eLTE base station and the service supportindicator indicates that the service is not supported by an NR and aneLTE and the terminal is supported to be re-directed to an EPS tosupport the service, and a condition where the session operationinformation indicates that the terminal is to be re-directed to an EPS.

Optionally, when the second network element has received the sessionoperation information, the performing the relevant operation on theservice in accordance with the acquired service indication informationmay include at least one of: when the session operation informationindicates that the terminal is to be handed over to the eLTE, handingover the terminal to the eLTE; when the session operation informationindicates that the terminal is to be handed over to an EPS, handing overthe terminal to an EPS; and when the session operation informationindicates that the terminal is to be re-directed to an EPS, re-directingthe terminal to an EPS.

It should be appreciated that, the implementation of the method in anembodiment of the present disclosure may refer to the relevantdescription about the second network element in FIG. 2 through FIG. 4with a same beneficial effect, and thus will not be particularly definedherein.

The present disclosure further provides in an embodiment a serviceindication method which, as shown in FIG. 6 , includes the followingsteps.

Step 601: transmitting, by a terminal, a registration request message toa core network element. In an embodiment of the present disclosure, theregistration request message may include service capability informationabout the terminal.

Step 602: transmitting, by the core network element, a registrationacceptance message to the terminal.

Upon the receipt of the registration request message, the core networkelement (e.g., an AMF), may determine at least one of supportinformation about an emergency service, preference information about theemergency service, support information about a voice service, andpreference information about the voice service. Next, the core networkelement (e.g., the AMF) may transmit the registration acceptance messageto the terminal. In an embodiment of the present disclosure, theregistration acceptance message may include at least one of the supportinformation about the emergency service, the preference informationabout the emergency service, the support information about the voiceservice, and the preference information about the voice service.

It should be appreciated that, the support information about theemergency service, the preference information about the emergencyservice, the support information about the voice service, and thepreference information about the voice service may refer to thedescription about the service indication information in the embodimentsas shown in FIG. 2 through FIG. 5 with a same beneficial effect, andthus will not be particularly defined herein.

The present disclosure further provides in an embodiment a serviceindication method which, as shown in FIG. 7 , includes: Step 701 oftransmitting, by an RAN element, an NG interface establishment requestmessage to a core network element; and Step 702 of transmitting, by thecore network element, an NG interface establishment response message tothe RAN element. An NG interface may be an interface between the RANelement and the core network element.

The NG interface establishment request message may include a capabilityof the RAN element, e.g., at least one of support information about anemergency service and support information about a voice service.

The NG interface establishment response message may include a capabilityof the core network element, e.g., at least one of the supportinformation about the emergency service and the support informationabout the voice service.

It should be appreciated that, the support information about theemergency service and the support information about the voice servicemay refer to the description about the service indication information inthe embodiments as shown in FIG. 2 through FIG. 5 with a same beneficialeffect, and thus will not be particularly defined herein.

The present disclosure further provides in an embodiment a serviceindication method which, as shown in FIG. 8 , includes: Step 801 oftransmitting, by a first RAN element, an Xn interface establishmentrequest message to a second RAN element; and Step 802 of transmitting,by the second RAN element, an Xn interface establishment responsemessage to the first RAN element. An Xn interface may be an interfacebetween the first RAN element and the second RAN element.

The Xn interface establishment request message may include a capabilityof the first RAN element, e.g., at least one of support informationabout an emergency service and support information about a voiceservice.

The Xn interface establishment response message may include a capabilityof the second RAN element, e.g., at least one of the support informationabout the emergency service and the support information about the voiceservice.

It should be appreciated that, the support information about theemergency service and the support information about the voice servicemay refer to the description about the service indication information inthe embodiments as shown in FIG. 2 through FIG. 5 with a same beneficialeffect, and thus will not be particularly defined herein.

The present disclosure further provides in an embodiment a serviceindication method which, as shown in FIG. 9 , includes the followingsteps.

Step 901: when a terminal needs to initiate an emergency service,transmitting, by the terminal, a PDU session establishment requestmessage to an AMF in accordance with service indication information.

Step 902: transmitting, by the AMF, a session text creation request toan SMF.

Step 903: transmitting, by the SMF, a session text creation response tothe AMF.

Step 904: performing an N4 session procedure between the SMF and a UPF.

Step 905: transmitting an N1/N2 message between the AMF and the SMF.

Steps 902 to 905 relate to a PDU session establishment procedure for acore network, which will not be particularly defined herein.

Step 906: transmitting, by the AMF, a PDU session resource establishmentrequest message to the terminal. In an embodiment of the presentdisclosure, the PDU session resource establishment request message mayinclude the service indication information.

In an embodiment of the present disclosure, an RAN may determine, inaccordance with the service indication information, at least one ofwhether to accept an establishment request of a PDU session or QoS flowfor the service, whether to switch the terminal to an eLTE, whether toswitch the terminal to an EPS, and whether to re-direct the terminal toan EPS, which correspond to Steps 907 a, 907 b, 907 c and 907 drespectively.

The present disclosure further provides in an embodiment a serviceindication method which, as shown in FIG. 10 , includes the followingsteps.

Step 1001: when a terminal needs to initiate an emergency service,transmitting, by the terminal, a service request to an AMF in accordancewith service indication information. A network may determine that theemergency service is to be supported in a fallback mode.

Step 1002: transmitting, by the AMF, the service indication informationto an RAN. The service indication information may include serviceoperation information, i.e., emergency service operation information,and it may be transmitted through an N2 message.

The RAN may determine, in accordance with the service indicationinformation, at least one of whether to switch the terminal to an eLTE,whether to switch the terminal to an EPS, and whether to re-direct theterminal to an EPS, which correspond to Steps 1003 a, 1003 b and 1003 crespectively.

The present disclosure further provides in an embodiment a terminal 1100which, as shown in FIG. 11 , includes: an acquisition module 1101configured to acquire service indication information, the serviceindication information including at least one of support informationabout a service and preference information about the service, theservice including at least one of an emergency service and a voiceservice; and an operation module 1102 configured to perform a relevantoperation on the service in accordance with the acquired serviceindication information.

Optionally, as shown in FIG. 12 , the terminal 1100 may further includea transmission module 1103 configured to transmit service capabilityinformation about the terminal to a first network element, and theservice capability information may be used to indicate whether theservice is supported by the terminal.

Optionally, the support information about the service may include atleast one of a service support indicator and service support typeinformation.

Optionally, the service support indicator may be used to indicatewhether the service is supported, or the service support indicator maybe used to indicate at least one of whether the service is supported byan NR, whether the service is supported by an eLTE, and whether theservice is supported by an EPS.

Optionally, whether the service is supported by the EPS may include atleast one of whether the terminal is supported to be handed over to anEPS to support the service and whether the terminal is supported to bere-directed to an EPS to support the service.

Optionally, the service support type information may be used to indicatesupport type for the service, or the service support type informationmay be used to indicate at least one of whether the service is supportedby an NR, whether the service is supported by an eLTE, whether theservice is supported by an EPS, whether the terminal is handed over toan EPS to support the service, and whether the terminal is re-directedto an EPS to support the service.

Optionally, the service indication information may further includeindication information indicating whether the service is supported in afallback mode.

Optionally, the preference information about the service may include atleast one of preference information indicating a preference ofinitiating PDU session establishment for the service, preferenceinformation indicating a preference of initiating a service request forthe service, preference information indicating a preference ofinitiating PDU session establishment for the service preferentially andthen initiating a service request for the service, and preferenceinformation indicating a preference of initiating a service request forthe service preferentially and then initiating PDU session establishmentfor the service.

Optionally, the service indication information may be a piece of serviceindication information at a location area, and a different piece ofservice indication information may correspond to a different locationarea respectively, i.e., the pieces of service indication information atdifferent location areas (e.g., TAs) may be different.

The terminal in an embodiment of the present disclosure is capable ofimplementing the procedures for the terminal in FIG. 2 and FIG. 3 toeffectively perform the relevant operation on the service, which willthus not be particularly defined herein.

The present disclosure further provides in an embodiment a networkelement which is a first network element. As shown in FIG. 13 , thenetwork element 1300 includes: an acquisition module 1301 configured toacquire service capability information; and a determination module 1302configured to determine service indication information in accordancewith the acquired service capability information, the service indicationinformation including at least one of support information about aservice, service operation information, and preference information aboutthe service, the service including at least one of an emergency serviceand a voice service.

Optionally, as shown in FIG. 14 , the acquisition module 1301 mayinclude at least one of: a first reception unit 13011 configured toreceive service capability information about a terminal from theterminal, the service capability information being used to indicatewhether the service is supported by the terminal; and a second receptionunit 13012 configured to receive service capability information about asecond network element from the second network element, the servicecapability information being used to indicate whether the service issupported by the second network element.

Optionally, the service capability information about the terminal mayinclude at least one of whether the service is supported in anon-fallback mode, whether the service is supported in a fallback mode,whether an EPS is to be supported, whether the terminal is supported tobe handed over to an EPS, whether the terminal is supported to bere-directed to an EPS, whether PDU session establishment for the serviceis supported to be initiated, and whether a service request for theservice is supported to be initiated; and/or the service capabilityinformation about the second network element may include at least one ofwhether the service is supported in a non-fallback mode, whether theservice is supported in a fallback mode, whether the terminal issupported to be handed over to a network supporting the service, whetherthe terminal is supported to be handed over to an EPS, whether theterminal is supported to be re-directed to an EPS, and whether theservice is supported directly.

Optionally, as shown in FIG. 15 , the network element 1300 may furtherinclude at least one of: a first transmission module 1303 configured totransmit the service indication information to the terminal; and asecond transmission module 1304 configured to transmit the serviceindication information to the second network element.

Optionally, the support information about the service may include atleast one of a service support indicator and service support typeinformation.

Optionally, the service support indicator may be used to indicatewhether the service is supported, or the service support indicator maybe used to indicate at least one of whether the service is supported byan NR, whether the service is supported by an eLTE, and whether theservice is supported by an EPS.

Optionally, whether the service is supported by the EPS may include atleast one of whether the terminal is supported to be handed over to anEPS to support the service and whether the terminal is supported to bere-directed to an EPS to support the service.

Optionally, the service support type information may be used to indicatesupport type for the service, or the service support type informationmay be used to indicate at least one of whether the service is supportedby an NR, whether the service is supported by an eLTE, whether theservice is supported by an EPS, whether the terminal is handed over toan EPS to support the service, and whether the terminal is re-directedto an EPS to support the service.

Optionally, the service indication information may further includeindication information indicating whether the service is supported in afallback mode.

Optionally, the service operation information may include at least oneof indication information indicating that a PDU session for the serviceis to be accepted or a request for establishing a QoS flow is to beaccepted, indication information indicating that the terminal is to behanded over to the eLTE, indication information indicating that theterminal is to be handed over to an EPS, and indication informationindicating that the terminal is to be re-directed to an EPS.

Optionally, when a predetermined condition has been met, the serviceindication information may include the preference information about theservice.

Optionally, the predetermined condition may include at least one of acondition where the support information about the service indicates thatthe service is supported, and a condition where the support informationabout the service in a fallback mode indicates that the service issupported in a fallback mode.

Optionally, the preference information about the service may include atleast one of preference information indicating a preference ofinitiating PDU session establishment for the service, preferenceinformation indicating a preference of initiating a service request forthe service, preference information indicating a preference ofinitiating PDU session establishment for the service preferentially andthen initiating a service request for the service, and preferenceinformation indicating a preference of initiating a service request forthe service preferentially and then initiating PDU session establishmentfor the service.

Optionally, the service indication information may be a piece of serviceindication information at a location area, and a different piece ofservice indication information may correspond to a different locationarea respectively.

The network element in an embodiment of the present disclosure iscapable of implementing the procedures for the first network element inFIG. 4 to enable the terminal to effectively perform the relevantoperation on the service, which will not be particularly defined herein.

The present disclosure further provides in an embodiment a networkelement which is a second network element. As shown in FIG. 16 , thenetwork element 1600 includes: an acquisition module 1601 configured toacquire service indication information, the service indicationinformation including at least one of support information about aservice, service operation information, and preference information aboutthe service, the service including at least one of an emergency serviceand a voice service; and an operation module 1602 configured to performa relevant operation on the service in accordance with the acquiredservice indication information.

Optionally, as shown in FIG. 17 , the network element 1600 may furtherinclude a transmission module 1603 configured to transmit servicecapability information about the second network element to a firstnetwork element, and the service capability information may be used toindicate whether the service is supported by the second network element.

Optionally, the support information about the service may include atleast one of a service support indicator and service support typeinformation.

Optionally, the service support indicator may be used to indicatewhether the service is supported, or the service support indicator maybe used to indicate at least one of whether the service is supported byan NR, whether the service is supported by an eLTE, and whether theservice is supported by an EPS.

Optionally, the service support type information may be used to indicatesupport type for the service, or the service support type informationmay be used to indicate at least one of whether the service is supportedby an NR, whether the service is supported by an eLTE, whether theservice is supported by an EPS, whether the terminal is handed over toan EPS to support the service, and whether the terminal is re-directedto an EPS to support the service.

Optionally, the service indication information may further includeindication information indicating whether the service is supported in afallback mode.

Optionally, the service operation information may include at least oneof indication information indicating that a PDU session for the serviceis to be accepted or a request for establishing a QoS flow is to beaccepted, indication information indicating that the terminal is to behanded over to the eLTE, indication information indicating that theterminal is to be handed over to an EPS, and indication informationindicating that the terminal is to be re-directed to an EPS.

Optionally, the service indication information may be a piece of serviceindication information at a location area, and a different piece ofservice indication information may correspond to a different locationarea respectively.

Optionally, the operation module 1602 is further configured to receive arequest for establishing a PDU session or QoS flow for the service,and/or receive session operation information.

Optionally, when the second network element has received the request forestablishing a PDU session or QoS flow for the service or has receivedthe session operation information, the operation module 1602 is furtherconfigured to perform at least one of the following operations: when afirst condition has been met, receiving the request for establishing aPDU session or QoS flow for the service, the first condition includingat least one of a condition where the second network element is an NRbase station and the service support indicator indicates that theservice is supported by the NR, a condition where the second networkelement is an eLTE base station and the service support indicatorindicates that the service is supported by the eLTE condition, and acondition where the session operation information indicates that therequest for establishing a PDU session or QoS flow for the service is tobe accepted; when a second condition has been met, handing over theterminal to the eLTE, the second condition including at least one of acondition where the second network element is the NR base station andthe service support indicator indicates that the service is notsupported by the NR condition and the service is supported by the eLTEcondition, and a condition where the session operation informationindicates that the terminal is to be handed over to the eLTE; when athird condition has been met, handing over the terminal to an EPS, thethird condition including at least one of a condition where the secondnetwork element is an NR base station or an eLTE base station and theservice support indicator indicates that the service is not supported byan NR and an eLTE and the terminal is supported to be handed over to anEPS to support the service, and a condition where the session operationinformation indicates that the terminal is to be handed over to an EPS;and when a fourth condition has been met, re-directing the terminal toan EPS, the fourth condition including at least one of a condition wherethe second network element is an NR base station or an eLTE base stationand the service support indicator indicates that the service is notsupported by an NR and an eLTE and the terminal is supported to bere-directed to an EPS to support the service, and a condition where thesession operation information indicates that the terminal is to bere-directed to an EPS.

Optionally, the operation module 1602 is further configured to performthe relevant operation on the service indicated by the service operationinformation in accordance with the service operation information.

The network element in an embodiment of the present disclosure iscapable of implementing the procedures for the second network element inFIG. 5 to enable the terminal to effectively perform the relevantoperation on the service, which will thus not be particularly definedherein.

FIG. 18 shows a hardware structure of a terminal according to anembodiment of the present disclosure. As shown in FIG. 18 , the terminal1800 may include, but not limited to, a radio frequency (RadioFrequency, RF) unit 1801, a network module 1802, an audio output unit1803, an input unit 1804, a sensor 1805, a display unit 1806, a userinput unit 1807, an interface unit 1808, a memory 1809, a processor1810, and a power source 1811. It should be appreciated that, thestructure in FIG. 18 shall not be construed as limiting the UE. The UEmay include more or fewer members, or some members may be combined, orthe UE may include some other members not shown in FIG. 18 . In anembodiment of the present disclosure, the UE may include, but notlimited to, mobile phone, flat-panel computer, laptop computer, personaldigital assistant (Personal Digital Assistant, PDA), vehicle-mountedterminal, wearable device or pedometer.

The RF unit 1801 is configured to: acquire service indicationinformation, the service indication information including at least oneof support information about a service and preference information aboutthe service, the service including at least one of an emergency serviceand a voice service; and perform a relevant operation on the service inaccordance with the acquired service indication information.

Optionally, prior to acquiring the service indication information, theRF unit 1801 is further configured to transmit service capabilityinformation about the terminal to a first network element, and theservice capability information may be used to indicate whether theservice is supported by the terminal.

Optionally, the support information about the service may include atleast one of a service support indicator and service support typeinformation.

Optionally, the service support indicator may be used to indicatewhether the service is supported, or the service support indicator maybe used to indicate at least one of whether the service is supported byan NR, whether the service is supported by an eLTE, and whether theservice is supported by an EPS.

Optionally, whether the service is supported by the EPS may include atleast one of whether the terminal is supported to be handed over to anEPS to support the service and whether the terminal is supported to bere-directed to an EPS to support the service.

Optionally, the service support type information may be used to indicatesupport type for the service, or the service support type informationmay be used to indicate at least one of whether the service is supportedby an NR, whether the service is supported by an eLTE, whether theservice is supported by an EPS, whether the terminal is handed over toan EPS to support the service, and whether the terminal is re-directedto an EPS to support the service.

Optionally, the service indication information may further includeindication information indicating whether the service is supported in afallback mode.

Optionally, the preference information about the service may include atleast one of preference information indicating a preference ofinitiating PDU session establishment for the service, preferenceinformation indicating a preference of initiating a service request forthe service, preference information indicating a preference ofinitiating PDU session establishment for the service preferentially andthen initiating a service request for the service, and preferenceinformation indicating a preference of initiating a service request forthe service preferentially and then initiating PDU session establishmentfor the service.

Optionally, the service indication information may be a piece of serviceindication information at a location area, and a different piece ofservice indication information may correspond to a different locationarea.

The terminal 1800 may perform the relevant operation on the serviceeffectively.

It should be appreciated that, in an embodiment of the presentdisclosure, the RF unit 1801 is configured to transmit and receivesignals during the information transmission or phone call. To bespecific, the RF unit 1801 may, upon the receipt of downlink data from abase station, transmit the downlink data to the processor 1810 forsubsequent treatment. In addition, the RF unit 1801 may transmit uplinkdata to the base station. Usually, the RF unit 1801 may include, but notlimited to, an antenna, at least one amplifier, a transceiver, acoupler, a low-noise amplifier and a duplexer. In addition, the RF unit1801 may communicate with a network and the other devices via a wirelesscommunications system.

The network module 1802 is configured to enable the terminal to accessthe broadband Internet in a wireless manner, e.g., help a user toreceive and send an e-mail, browse a web page or access a streamingmedia.

The audio output unit 1803 is configured to convert audio data receivedby the RF unit 1801 or the network module 1802, or audio data stored inthe memory 1809, into an audio signal and output the audio signal as asound. In addition, the audio output unit 1803 is further configured toprovide an audio output related to a specific function executed by theterminal 1800 (e.g., a sound occurring when a calling signal or amessage has been received). The audio output unit 1803 may include aloudspeaker, a buzzer and a receiver.

The input unit 1804 is configured to receive an audio or video signal.It may include a graphics processing unit (Graphics Processing Unit,GPU) 18041 and a microphone 18042. The GPU 18041 is configured toprocess image data of a static image or video acquired by an imagecollection unit (e.g., a camera) in a video capturing mode or an imagecapturing mode, and a processed image frame may be displayed by thedisplay unit 1806. The image frame processed by the GPU 18041 may bestored in the memory 1809 (or any other storage medium) or transmittedvia the RF unit 1801 or network module 1802. The microphone 18042 isconfigured to receive a sound, and convert the sound into voice data. Ina call mode, the processed audio data may be converted into data in aformat capable of being transmitted by the RF unit 1801 to a mobilecommunications base station.

The at least one sensor 1805 may include a light sensor, a movementsensor and the other sensors. To be specific, the light sensor mayinclude an ambient light sensor or a proximity sensor. The ambient lightsensor is configured to adjust a brightness value of a display panel18061 in accordance with ambient light. The proximity sensor isconfigured to turn off the display panel 1661 and/or a backlight sourcewhen the terminal 1800 moves close to an ear. As one of the movementsensors, an accelerometer may detect acceleration in various directions(usually a three-axis accelerometer), and detect a level and a directionof a gravity force in a static state. Through the accelerometer, it isable to identify a posture of the terminal (e.g., perform a handing overoperation between portrait and landscape orientations, play relevantgames, and calibrate a posture of a magnetometer), and performvibration-related functions (e.g., count steps and strikes). The sensor1805 may further include a fingerprint sensor, a pressure sensor, aniris sensor, a molecule sensor, a gyroscope, a barometer, a hygrometer,a thermometer or an infrared sensor, which will not be particularlydefined herein.

The display unit 1806 is configured to display information inputted bythe user or provided to the user. The display unit 1806 may include thedisplay panel 18061, e.g., a liquid crystal display (Liquid CrystalDisplay, LCD) panel, or an organic light-emitting diode (OrganicLight-Emitting Diode, OLED) panel.

The user input unit 1807 is configured to receive digital or characterinformation inputted by the user, and generate a key signal inputrelated to user settings and function control of the terminal. To bespecific, the user input unit 1807 may include a touch panel 18071 andan input device 18072. The touch panel 18071, also called as touchscreen, is configured to collect a touch operation made by the user onor in proximity to the touch panel (e.g., an operation made by the userthrough any appropriate object or attachment (e.g., finger or stylus) onor in the proximity to the touch panel 18071). The touch panel 18071 mayinclude a touch detection unit and a touch controller. The touchdetection unit is configured to detect a touch position and a signalgenerated due to the touch operation, and to transmit the signal to thetouch controller. The touch controller is configured to receive touchinformation from the touch detection unit, convert it into coordinatesof a touch point, transmit the coordinates to the processor 1810, andreceive and execute a command from the processor 1810. In addition, thetouch panel 18071 may be of a resistive type, a capacitive type, aninfrared type or a surface acoustic wave (SAW) type. The other inputdevice 18072 may include, but not limited to, a physical keyboard, afunctional button (e.g., a volume control button or an on/off button), atrackball, a mouse, and a joystick, which will not be particularlydefined herein.

Further, the touch panel 18071 may cover the display panel 18061. Whenthe touch operation made on or in proximity to the touch panel 18071 hasbeen detected, the touch panel 18071 may transmit the touch informationto the processor 1810, so as to determine a type of a touch event. Then,the processor 1810 may control the display panel 18061 to provide acorresponding visual output in accordance with the type of the touchevent. Although the touch panel 18071 and the display panel 18061 areconfigured as two separate members in FIG. 18 , in an embodiment of thepresent disclosure, they may be integrated so as to achieve the inputand output functions of the electronic device, which will not beparticularly defined herein.

The interface unit 1808 is configured to provide an interface between anexternal device and the terminal 1800. For example, the external devicemay include a wired or wireless headset port, an external power sourceport (or a charging port), a wired or wireless data port, a memory cardport, a port for a device having an identification module, an audioinput/output (I/O) port, a video I/O port, and an earphone port. Theinterface unit 1808 is configured to receive an input from the externaldevice (e.g., data information and electricity) and transmit the inputto one or more elements of the terminal 1800, or transmit data betweenthe terminal 1800 and the external device.

The memory 1809 is configured to store therein a software applicationand various data. It may mainly include an application storage area anda data storage area. An operating system and at least one applicationfor the functions (e.g., an audio/image playing function) may be storedin the application storage area. Data created in accordance with theoperation of the mobile phone (e.g., audio data and textbook) may bestored in the data storage area. In addition, the memory 1809 mayinclude a high-speed random access memory (Random Access Memory, RAM),or a non-volatile memory (e.g., at least one magnetic disk or flashmemory), or any other volatile solid state memory.

As a control center of the electronic device, the processor 1810 may beconnected to the other members of the electronic device via variousinterfaces and circuits, and configured to run or execute the softwareprogram and/or module stored in the memory 1809, and call the datastored in the memory 1809, so as to execute the functions of theelectronic device and process the data, thereby to monitor the entireelectronic device. The processor 1810 may include one or more processingunits. In an embodiment of the present disclosure, an applicationprocessor and a modem may be integrated into the processor 1810. Theapplication processor is mainly configured to process the operatingsystem, a user interface and the application. The modem is mainlyconfigured to process wireless communications. It should be appreciatedthat, the modem may also not be integrated into the processor 1810.

The power source 1811 (e.g., a battery) is configured to supply power tothe members of the terminal 1800. In an embodiment of the presentdisclosure, the power source 1811 is logically connected to theprocessor 1810 via a power source management system, so as to achievesuch functions as charging, discharging and power consumption managementthrough the power source management system.

In addition, the terminal 1800 may include some functional modules notshown in FIG. 18 , which will not be particularly defined herein.

The present disclosure further provides in an embodiment a terminal,which includes a processor 1810, a memory 1809, and a computer programstored in the memory 1809 and executed by the processor 1810. Theprocessor 1810 is configured to execute the computer program so as toimplement the above service indication method with a same technicaleffect, which will not be particularly defined herein.

The present disclosure further provides in an embodiment an availablenetwork element which is a first network element. As shown in FIG. 19 ,the network element 1900 includes a processor 1901, a transceiver 1902,a memory 1903 and a bus interface. The transceiver 1902 is configured toacquire service capability information. The processor 1901 is configuredto determine service indication information in accordance with theacquired service capability information. The service indicationinformation may include at least one of support information about aservice, service operation information, and preference information aboutthe service, the service may include at least one of an emergencyservice and a voice service.

Optionally, during the acquisition of the service capabilityinformation, the transceiver 1902 is configured to perform at least oneof the following operations: receiving service capability informationabout a terminal from the terminal, the service capability informationbeing used to indicate whether the service is supported by the terminal;and receiving service capability information about a second networkelement from the second network element, the service capabilityinformation being used to indicate whether the service is supported bythe second network element.

Optionally, the service capability information about the terminal mayinclude at least one of whether the service is supported in anon-fallback mode, whether the service is supported in a fallback mode,whether an EPS is to be supported, whether the terminal is supported tobe handed over to an EPS, whether the terminal is supported to bere-directed to an EPS, whether PDU session establishment for the serviceis supported to be initiated, and whether a service request for theservice is supported to be initiated; and/or the service capabilityinformation about the second network element may include at least one ofwhether the service is supported in a non-fallback mode, whether theservice is supported in a fallback mode, whether the terminal issupported to be handed over to a network supporting the service, whetherthe terminal is supported to be handed over to an EPS, whether theterminal is supported to be re-directed to an EPS, and whether theservice is supported directly.

Optionally, subsequent to determining the service indicationinformation, the transceiver 1902 is further configured to perform atleast one of the following operations: transmitting the serviceindication information to the terminal; and transmitting the serviceindication information to the second network element.

Optionally, the support information about the service may include atleast one of a service support indicator and service support typeinformation.

Optionally, the service support indicator may be used to indicatewhether the service is supported, or the service support indicator maybe used to indicate at least one of whether the service is supported byan NR, whether the service is supported by an eLTE, and whether theservice is supported by an EPS.

Optionally, whether the service is supported by the EPS may include atleast one of whether the terminal is supported to be handed over to anEPS to support the service and whether the terminal is supported to bere-directed to an EPS to support the service.

Optionally, the service support type information may be used to indicatesupport type for the service, or the service support type informationmay be used to indicate at least one of whether the service is supportedby an NR, whether the service is supported by an eLTE, whether theservice is supported by an EPS, whether the terminal is handed over toan EPS to support the service, and whether the terminal is re-directedto an EPS to support the service.

Optionally, the service indication information may further includeindication information indicating whether the service is supported in afallback mode.

Optionally, the service operation information may include at least oneof indication information indicating that a PDU session for the serviceis to be accepted or a request for establishing a QoS flow is to beaccepted, indication information indicating that the terminal is to behanded over to the eLTE, indication information indicating that theterminal is to be handed over to an EPS, and indication informationindicating that the terminal is to be re-directed to an EPS.

Optionally, when a predetermined condition has been met, the serviceindication information may include the preference information about theservice, and the preference information about the service may include atleast one of preference information about the emergency service, andpreference information about the voice service. Optionally, thepredetermined condition may include at least one of a condition wherethe support information about the service indicates that the service issupported, and a condition where the support information about theservice in a fallback mode indicates that the service is supported in afallback mode.

Optionally, the preference information about the service may include atleast one of preference information indicating a preference ofinitiating PDU session establishment for the service, preferenceinformation indicating a preference of initiating a service request forthe service, preference information indicating a preference ofinitiating PDU session establishment for the service preferentially andthen initiating a service request for the service, and preferenceinformation indicating a preference of initiating a service request forthe service preferentially and then initiating PDU session establishmentfor the service.

Optionally, the service indication information may be a piece of serviceindication information at a location area, and a different piece ofservice indication information may correspond to a different locationarea.

Through the network element 1900, it is able for the terminal toinitiate the service effectively.

The transceiver 1902 is configured to receive and transmit data underthe control of the processor 1901, and it may include at least twoantenna ports.

In FIG. 19 , bus architecture may include a number of buses and bridgesconnected to each other, so as to connect various circuits for one ormore processors 1901 and one or more memories 1903. In addition, as isknown in the art, the bus architecture may be used to connect any othercircuits, such as a circuit for a peripheral device, a circuit for avoltage stabilizer and a power management circuit. The bus interface maybe provided, and the transceiver 1902 may consist of a plurality ofelements, i.e., a transmitter and a receiver for communication with anyother devices over a transmission medium. With respect to different UEs,a user interface 1904 may also be provided for devices which are to bearranged inside or outside the UE, and these devices may include but notlimited to a keypad, a display, a speaker, a microphone and a joystick.The processor 1901 may take charge of managing the bus architecture aswell as general processings. The memory 1903 may store therein data forthe operation of the processor 1901.

The present disclosure further provides in an embodiment a networkelement which includes a processor 1901, a memory 1903, and a computerprogram stored in the memory 1903 and executed by the processor 1901.The processor 1901 is configured to execute the computer program so asto implement the above-mentioned service indication method with a sametechnical effect, which will not be particularly defined herein.

The present disclosure further provides in an embodiment an availablenetwork element which is a second network element. As shown in FIG. 20 ,the network element 2000 may include a processor 2001, a transceiver2002, a memory 2003 and a bus interface. The transceiver 2002 isconfigured to: acquire service indication information, the serviceindication information including at least one of support informationabout a service, service operation information, and preferenceinformation about the service, the service including at least one of anemergency service and a voice service; and perform a relevant operationon the service in accordance with the acquired service indicationinformation.

Optionally, prior to acquiring the service indication information, thetransceiver 2002 is further configured to transmit service capabilityinformation about the second network element to a first network element,and the service capability information may be used to indicate whetherthe service is supported by the second network element.

Optionally, the support information about the service may include atleast one of a service support indicator and service support typeinformation.

Optionally, the service support indicator may be used to indicatewhether the service is supported, or the service support indicator maybe used to indicate at least one of whether the service is supported byan NR, whether the service is supported by an eLTE, and whether theservice is supported by an EPS.

Optionally, the service support type information may be used to indicatesupport type for the service, or the service support type informationmay be used to indicate at least one of whether the service is supportedby an NR, whether the service is supported by an eLTE, whether theservice is supported by an EPS, whether the terminal is handed over toan EPS to support the service, and whether the terminal is re-directedto an EPS to support the service.

Optionally, the service indication information may further includeindication information indicating whether the service is supported in afallback mode.

Optionally, the service operation information may include at least oneof indication information indicating that a PDU session for the serviceis to be accepted or a request for establishing a QoS flow is to beaccepted, indication information indicating that the terminal is to behanded over to the eLTE, indication information indicating that theterminal is to be handed over to an EPS, and indication informationindicating that the terminal is to be re-directed to an EPS.

Optionally, the service indication information may be a piece of serviceindication information at a location area, and a different piece ofservice indication information may correspond to a different locationarea.

Optionally, the transceiver 2002 is further configured to receive arequest for establishing a PDU session or QoS flow for the service,and/or receive session operation information.

Optionally, when the second network element has received the request forestablishing a PDU session or QoS flow for the service or has receivedthe session operation information, the transceiver 2002 is furtherconfigured to perform at least one of the following operations: when afirst condition has been met, receiving the request for establishing aPDU session or QoS flow for the service, the first condition includingat least one of a condition where the second network element is an NRbase station and the service support indicator indicates that theservice is supported by the NR, a condition where the second networkelement is an eLTE base station and the service support indicatorindicates that the service is supported by the eLTE condition, and acondition where the session operation information indicates that therequest for establishing a PDU session or QoS flow for the service is tobe accepted; when a second condition has been met, handing over theterminal to the eLTE, the second condition including at least one of acondition where the second network element is the NR base station andthe service support indicator indicates that the service is notsupported by the NR condition and the service is supported by the eLTEcondition, and a condition where the session operation informationindicates that the terminal is to be handed over to the eLTE; when athird condition has been met, handing over the terminal to an EPS, thethird condition including at least one of a condition where the secondnetwork element is an NR base station or an eLTE base station and theservice support indicator indicates that the service is not supported byan NR and an eLTE and the terminal is supported to be handed over to anEPS to support the service, and a condition where the session operationinformation indicates that the terminal is to be handed over to an EPS;and when a fourth condition has been met, re-directing the terminal toan EPS, the fourth condition including at least one of a condition wherethe second network element is an NR base station or an eLTE base stationand the service support indicator indicates that the service is notsupported by an NR and an eLTE and the terminal is supported to bere-directed to an EPS to support the service, and a condition where thesession operation information indicates that the terminal is to bere-directed to an EPS.

Through the network element 2000, it is able for the terminal toinitiate the service effectively.

The transceiver 2002 is configured to receive and transmit data underthe control of the processor 2001, and it may include at least twoantenna ports.

In FIG. 20 , bus architecture may include a number of buses and bridgesconnected to each other, so as to connect various circuits for one ormore processors 2001 and one or more memories 2003. In addition, as isknown in the art, the bus architecture may be used to connect any othercircuits, such as a circuit for a peripheral device, a circuit for avoltage stabilizer and a power management circuit. The bus interface maybe provided, and the transceiver 2002 may consist of a plurality ofelements, i.e., a transmitter and a receiver for communication with anyother devices over a transmission medium. With respect to different UEs,a user interface 2004 may also be provided for devices which are to bearranged inside or outside the UE, and these devices may include but notlimited to a keypad, a display, a speaker, a microphone and a joystick.The processor 2001 may take charge of managing the bus architecture aswell as general processings. The memory 2003 may store therein data forthe operation of the processor 2001.

The present disclosure further provides in an embodiment a networkelement which includes a processor 2001, a memory 2003, and a computerprogram stored in the memory 2003 and executed by the processor 2001.The processor 2001 is configured to execute the computer program so asto implement the above-mentioned service indication method with a sametechnical effect, which will not be particularly defined herein.

The present disclosure further provides in an embodiment acomputer-readable storage medium storing therein a computer program. Thecomputer program is executed by a processor, so as to implement theabove-mentioned service indication method for the terminal, or implementthe above-mentioned service indication method for the first networkelement, or implement the service indication method for the secondnetwork element. The computer-readable storage medium may be an ROM, anRAM, a magnetic disk or an optical disk.

It should be appreciated that, such words as “include” or “including” orany other variations involved in the present disclosure intend toprovide non-exclusive coverage, so that a procedure, method, article ordevice including a series of elements may also include any otherelements not listed herein, or may include any inherent elements of theprocedure, method, article or device. If without any furtherlimitations, for the elements defined by such sentence as “including one. . . ”, it is not excluded that the procedure, method, article ordevice including the elements may also include any other identicalelements.

Through the above-mentioned description, it may be apparent for a personskilled in the art that the present disclosure may be implemented bysoftware as well as a necessary common hardware platform, or byhardware, and the former may be better in most cases. Based on this, thetechnical solutions of the present disclosure, partial or full, or partsof the technical solutions of the present disclosure contributing to therelated art, may appear in the form of software products, which may bestored in a storage medium (e.g., ROM/RAM, magnetic disk or opticaldisk) and include several instructions so as to enable a terminal device(mobile phone, computer, server, air conditioner or network device) toexecute the methods in embodiments of the present disclosure.

The above embodiments are for illustrative purposes only, but thepresent disclosure is not limited thereto. Obviously, a person skilledin the art may make further modifications and improvements withoutdeparting from the spirit of the present disclosure, and thesemodifications and improvements shall also fall within the scope of thepresent disclosure.

What is claimed is:
 1. A non-transitory computer-readable storage mediumstoring therein a computer program, wherein the computer program isexecuted by a processor of a Radio Access Network (RAN) so as toimplement a service indication method, the service indication methodcomprising: acquiring service indication information from an Access andMobility Management Function (AMF) and a Packet Data Unit (PDU) sessionor Quality of Service (QoS) flow establishment request for a service,the service indication information comprising support information aboutthe service, the service comprising at least one of an emergency serviceor a voice service; and preforming a relevant operation on the servicein accordance with the acquired service indication information and thePDU session or the QoS flow establishment request for the service,wherein the support information about the service comprises servicesupport type information; wherein the service support type informationis used to indicate whether redirection to Evolved Packet System (EPS)for supporting the service is possible or not, wherein the performingthe relevant operation on the service in accordance with the serviceindication information comprises one of: accepting a PDU session or QoSflow establishment request for the service, handing over the terminal toan enhanced Long Term Evolution (eLTE), handing over the terminal to anEPS, or re-directing the terminal to an EPS.
 2. The non-transitorycomputer-readable storage medium according to claim 1, wherein thesupport information about the service further comprises a servicesupport indicator; wherein the service support indicator is used toindicate whether the service is supported, or the service supportindicator is used to indicate at least one of whether the service issupported by an NR, whether the service is supported by an eLTE, orwhether the service is supported by an EPS.
 3. The non-transitorycomputer-readable storage medium according to claim 1, wherein prior toacquiring the service indication information, the service indicationmethod further comprises: transmitting service capability informationabout the RAN to the AMF, and the service capability information is usedto indicate whether the service is supported by the RAN.
 4. Thenon-transitory computer-readable storage medium according to claim 1,wherein the service indication information further comprises indicationinformation indicating whether the service is supported in a fallbackmethod.
 5. The non-transitory computer-readable storage medium accordingto claim 1, wherein the service indication information is a piece ofservice indication information at a location area, and a different pieceof service indication information corresponds to a different locationarea.
 6. The non-transitory computer-readable storage medium accordingto claim 1, wherein the performing the relevant operation on the servicein accordance with the acquired service indication informationcomprises: receiving a request for establishing a PDU session or QoSflow for the service, and/or receiving session operation information. 7.The non-transitory computer-readable storage medium according to claim6, wherein when the RAN has received the request for establishing a PDUsession or QoS flow for the service or has received the sessionoperation information, the performing the relevant operation on theservice in accordance with the acquired service indication informationcomprises at least one of: when a first condition has been met,receiving the request for establishing a PDU session or QoS flow for theservice, the first condition comprising at least one of a conditionwhere the RAN is an NR base station and the service support indicatorindicates that the service is supported by the NR, a condition where theRAN is an eLTE base station and the service support indicator indicatesthat the service is supported by the eLTE condition, or a conditionwhere the session operation information indicates that the request forestablishing a PDU session or QoS flow for the service is to beaccepted; when a second condition has been met, handing over theterminal to the eLTE, the second condition comprising at least one of acondition where the RAN is the NR base station and the service supportindicator indicates that the service is not supported by the NR but theservice is supported by the eLTE, or a condition where the sessionoperation information indicates that the terminal is to be handed overto the eLTE; when a third condition has been met, handing over theterminal to an EPS, the third condition comprising at least one of acondition where the RAN is an NR base station or an eLTE base stationand the service support indicator indicates that the service is notsupported by an NR or an eLTE but the terminal is supported to be handedover to an EPS to support the service, or a condition where the sessionoperation information indicates that the terminal is to be handed overto an EPS; or when a fourth condition has been met, re-directing theterminal to an EPS, the fourth condition comprising at least one of acondition where the RAN is an NR base station or an eLTE base stationand the service support indicator indicates that the service is notsupported by an NR or an eLTE but the terminal is supported to bere-directed to an EPS to support the service, or a condition where thesession operation information indicates that the terminal is to bere-directed to an EPS.
 8. An Access and Mobility Management Function(AMF), comprising a memory, a processor, and a program stored in thememory and executed by the processor, wherein the processor isconfigured to execute the program so as to implement a serviceindication method, the service indication method comprising: acquiringservice capability information; and determining service indicationinformation in accordance with the acquired service capabilityinformation and transmitting the service indication information to aRadio Access Network (RAN), the service indication informationcomprising support information about a service, the service comprisingat least one of an emergency service or a voice service, wherein thesupport information about the service comprises service support typeinformation; wherein the service support type information is used toindicate whether redirection to EPS for supporting the service ispossible or not, wherein the acquiring the service capabilityinformation comprises at least one of: receiving service capabilityinformation about a terminal from the terminal, the service capabilityinformation being used to indicate whether the service is supported bythe terminal.
 9. The AMF according to claim 8, wherein the acquiring theservice capability information further comprises: receiving servicecapability information about the RAN from the RAN, the servicecapability information being used to indicate whether the service issupported by the RAN.
 10. The AMF according to claim 9, wherein theservice capability information about the terminal comprises at least oneof: whether the service is supported in a non-fallback method, whetherthe service is supported in a fallback method, whether an evolved packetsystem (EPS) is to be supported, whether the terminal is supported to behanded over to an EPS, whether the terminal is supported to bere-directed to an EPS, whether packet data unit (PDU) sessionestablishment for the service is supported to be initiated, or whether aservice request for the service is supported to be initiated; and/or theservice capability information about the RAN comprises at least one of:whether the service is supported in a non-fallback method, whether theservice is supported in a fallback method, whether to handover theterminal to a network supporting the service is supported, whether tohandover the terminal to an EPS is supported, whether to redirect theterminal to an EPS is supported, or whether the service is supporteddirectly.
 11. The AMF according to claim 8, wherein subsequent todetermining the service indication information, the service indicationmethod further comprises: transmitting the service indicationinformation to the terminal.
 12. The AMF according to claim 8, whereinthe support information about the service further comprises a servicesupport indicator; wherein the service support indicator is used toindicate whether the service is supported, or the service supportindicator is used to indicate at least one of whether the service issupported by an NR, whether the service is supported by an eLTE, orwhether the service is supported by an EPS.
 13. The AMF according toclaim 8, wherein the service indication information further comprisesservice operation information or preference information about theservice; wherein the service support type information is used to furtherindicate at least one of: (i) whether the service is supported by a newradio (NR), (ii) whether the service is supported by an enhanced longterm evolution (eLTE), (iii) whether the service is supported by anevolved packet system (EPS), or (iv) whether handover to EPS forsupporting the service is possible or not.
 14. A non-transitorycomputer-readable storage medium storing therein a computer program,wherein the computer program is executed by a processor of an Access andMobility Management Function (AMF) so as to implement a serviceindication method, the service indication method comprising: acquiringservice capability information; and determining service indicationinformation in accordance with the acquired service capabilityinformation and transmitting the service indication information to aRadio Access Network (RAN), the service indication informationcomprising support information about a service, the service comprisingat least one of an emergency service or a voice service, wherein thesupport information about the service comprises service support typeinformation; wherein the service support type information is used toindicate whether redirection to EPS for supporting the service ispossible or not, wherein the acquiring the service capabilityinformation comprises at least one of: receiving service capabilityinformation about a terminal from the terminal, the service capabilityinformation being used to indicate whether the service is supported bythe terminal.
 15. The non-transitory computer-readable storage mediumaccording to claim 14, wherein the acquiring the service capabilityinformation further comprises: receiving service capability informationabout the RAN from the RAN, the service capability information beingused to indicate whether the service is supported by the RAN.
 16. Thenon-transitory computer-readable storage medium according to claim 15,wherein the service capability information about the terminal comprisesat least one of: whether the service is supported in a non-fallbackmethod, whether the service is supported in a fallback method, whetheran evolved packet system (EPS) is to be supported, whether the terminalis supported to be handed over to an EPS, whether the terminal issupported to be re-directed to an EPS, whether packet data unit (PDU)session establishment for the service is supported to be initiated, orwhether a service request for the service is supported to be initiated;and/or the service capability information about the RAN comprises atleast one of: whether the service is supported in a non-fallback method,whether the service is supported in a fallback method, whether tohandover the terminal to a network supporting the service is supported,whether to handover the terminal to an EPS is supported, whether toredirect the terminal to an EPS is supported, or whether the service issupported directly.
 17. The non-transitory computer-readable storagemedium according to claim 14, wherein subsequent to determining theservice indication information, the service indication method furthercomprises: transmitting the service indication information to theterminal.
 18. The non-transitory computer-readable storage mediumaccording to claim 14, wherein the support information about the servicefurther comprises a service support indicator; wherein the servicesupport indicator is used to indicate whether the service is supported,or the service support indicator is used to indicate at least one ofwhether the service is supported by an NR, whether the service issupported by an eLTE, or whether the service is supported by an EPS. 19.The non-transitory computer-readable storage medium according to claim14, wherein the service indication information further comprises serviceoperation information or preference information about the service. 20.The non-transitory computer-readable storage medium according to claim14, wherein the service support type information is used to furtherindicate at least one of: (i) whether the service is supported by a newradio (NR), (ii) whether the service is supported by an enhanced longterm evolution (eLTE), (iii) whether the service is supported by anevolved packet system (EPS), or (iv) whether handover to EPS forsupporting the service is possible or not.